Exact solution for the two-site correlated Kondo-Lattice Model - a limiting case for a metal

TL;DR

This paper derives an exact analytical solution for a two-site correlated Kondo-lattice model in a metallic state, providing insights into electron-magnetic moment interactions and electron correlations.

Contribution

It presents the first exact solution for the two-site correlated Kondo-lattice model in a metallic regime using an equation-of-motion approach.

Findings

Exact Green's function expression obtained

Analytical results for electron interactions in a metal

Advances understanding of correlated electron systems

Abstract

The correlated Kondo-lattice model is used to describe the interaction of electrons in a single conduction band with localized magnetic moments as well as their mutual repulsion. It is our intension to provide an analytical exact result for this model by considering a two-site cluster. An equation-of-motion approach as well as the spectral theorem is chosen to obtain the complete expression for the one-particle Green's function. In a forgoing article the problem has been solved for an insulator, the present paper is devoted to the technical more demanding task of a metal.